6-Bromo-2-naphthyl-β-D-galactopyranoside
6-Bromo-2-naphthyl-β-D-galactopyranoside is a chromogenic substrate commonly used to measure β-galactosidase enzyme activity in food, enzyme substrates, and culture media. Upon hydrolysis by β-galactosidase, it generates a yellow precipitate indicating the enzyme's presence.